.accordion {
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 2px;
}

.accordion__item + .accordion__item {
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.accordion__button {
    background-color: #f4f4f4;
    color: #444;
    cursor: pointer;
    padding: 10px;
    width: 100%;
    text-align: left;
    border: none;
}

.accordion__button:hover {
    background-color: #ddd;
}

.accordion__button:before {
    display: inline-block;
    content: '';
    height: 10px;
    width: 10px;
    margin-right: 12px;
    border-bottom: 2px solid currentColor;
    border-right: 2px solid currentColor;
    transform: rotate(-45deg);
}

.accordion__button[aria-expanded='true']::before,
.accordion__button[aria-selected='true']::before {
    transform: rotate(45deg);
}

.accordion__panel {
    padding: 20px;
    animation: fadein 0.35s ease-in;
}
